How to make a texture smaller?

Below is a script I use for my gun game. It works perfectly but, this texture (http://www.roblox.com/asset/?id=1370558016) as shown here and in the script is way too big covering a large amount of the screen. This is intended to be a crosshair. Any idea how to make that texture smaller?

PS: The script turns the player's mouse icon into whatever the texture ID is.

bin = script.Parent
normel = "http://www.roblox.com/asset/?id=1370558016"
friendly = "http://www.roblox.com/asset/?id=7419364"
enemy = "http://www.roblox.com/asset/?id=7419379"
function Run(mouse)
    mouse.Icon = normel
    local hit = mouse.Target
    if (hit == nil) then return end
        h = hit.Parent:FindFirstChild("Humanoid")
        if h ~= nil then
        torso = hit.Parent.Torso
        if torso ~= nil then
        if h.Health > 0 then
    if (torso.BrickColor == bin.Parent.Torso.BrickColor) then
        mouse.Icon = friendly
        elseif torso.BrickColor ~= bin.Parent.Torso.BrickColor then
        mouse.Icon = enemy
        end
        end
        end

    end
end